And ten per cent



i.F.PAGENDARM.

ROTARY VALVE GAS ENGINE.-

APPLICATIQN FILED APR. 12. 1918.

13,08,722! Patented July 1, 1919.

2 SHEETS-SHEET I.

IN VEN TOR.

3 v jomffimmmm J. F. PAGENDARM. ROTARY VALVE GAS ENGINE. APPLICATION FILED APR. 12. 19m.

1,308,722 Patented July 1, 1919.

'2 SHEETS-SHEET 2.

IN V EN TOR. JEJHN 5 PA GENDARM BY WTORNEY.

, UNITED I STATES PATENT OFFICE.

JOHN F. PAGENDARM, OF SAN FRANCISCO CENT. TO JOHN W. SHANNQN, OF SAN CALIFORNIA, ASSIGNOR OF SEVENTY PER RAFAEL, CALIFORNIA, AND TEN PER CENT.

TO WILLIAM VON HAGHT, TEN PER CENT. TO CHARLES R. TAYLOR, AND TEN PER GENT. TO WILLIAM F. CLEWE, ALL OF SON OMA, CALIFORNIA.

ROTARY-VALVE GAS-ENGINE.

Specification of Letters Patent.

Patented July 1, 1919.

Application filed April 12, 1918. Serial No. 228,267.

To all whom it may concern:

Be it known that I, JOHN F. PAGENDARM, a citizen of the United States, residing at San Francisco, in the county of San Francisco, State of California, have invented a new and useful Rotary-Valve Gas-Engine, of which the following is a specification in such full and clear terms as will enable those skilled in the art to construct and use the same.

This invention relates to a rotary valve 1 gas engine and its object is to produce a rotary valve engine which will have the Valveprotected from the high heat of explosion of the explosion en ine cylinder, while at the same time suita le means are provided for sealing the exhaust and inlet ports so that there will be no leakage of gas during the explosion and compression periods.

Another object of the invention is to provide a valve which may be operated in pairs from a single pinionwhereby one operating shaft only is required for each pair of cylinders used.

Other objects of the invention Will appear as the description proceeds.

An embodiment of the invention is shown in the drawings in which the same'refere-nce Fig. 4 is a side elevation of one of the rotary valves,

Fig. 5 is a perspective view of one of the packing rings used' in connection with the valve,

.Fig. 6 is a vertical sectional View of the engine shown in Fig. 1 showing the valve and inlet ports therein, Fig. 7 is a plan view in section of a slightly modified form of valve ring, and

Fig. 8 is a side elevation of the valve packing ring shown in Fig. 7.

The numeral 1 indicates the engine base which may be of any suitable form and which supports the cylinders '2, 3, 4, or any other number of said cylinders being bolted to the base in a well known manner, and having walls 6 forming a water acket about the same. The crank shaft is indicated at 7 and there are links 8 connecting the piston 10 with the cranks 11, all of which is well known in the art.

The rotary valve comprises a thin ring 12 with ports 13 and 14 therein, said portsbcing set opposite to one another in such a manner as to permit the inlet and escape of the gases used in t e engine. At the lower edge of the ring 1.. there is a gear 13, which gear is in mesh with a pinion 14' on a vertical shaft 15, said shaft having another gear 16 at its lower end in-inesh with the gear 17. The shaft 15 is driven by means of a chain 18 passing around the crank shaft and around the gear 17, the shaft 19 on which the gear 17 is secured rotating at the same speed as the crank shaft, while the gear 14: rotates the valve 12 at one-quarter the crank shaft speed, and since said valve is outside the water jacket there is little danger of it being prevented from turning due to overheating.

The exhaust manifold is shown at 21 while the inlet manifold is shown at 22 and the water cooling manifold is shown at 23. The engine has the usual spark plugs 24 for the operation thereof. In order to prevent the leakage of the gas at the ports, the ports leading into the engine cylinder are provided with movable rings 25 which press upon the ring 12 at the time of explosion packing and shortly thereafter until the explosion pressure has run down low enough to cease to be effective. As soon as the suction in the cylinder takes place the packing ring 25 is moved away from the ring 12, thereby reducing the friction on said packing ring and restoring thereto a quantity of oil in a thin film which will prevent the ring valve from turning hard.

moving it verti ca that the pressure on the valve ring 12 is al- The packing ring shown is provided Witi grooves which grooves act to no vent the escape of gas from the engine w ien under explosion. The ring 25 may be provided with piston rings 31 ifdesired but, that does not appear to be absolutely necessary.

In a igs. 7 and 8 there 1s shown a shghtly modified form ol packing ring ,in 'Wh1ch the ring islet into ach annel like groove oi the inner part of the engine cylinder as SlIOWI!) as the suction stroke comes on, the ring will.

move back and release itself from the moving valve ring.

it is to be noted that the casing surrounding the valve is in one positionfor all of the v cylinde s-and that it is placed thereon by 1y,and it is also to be notct inost' equalized since the inlet and outlet ports are on 'opposite'sides of the cylinder Another feature that will be noted in connection with both forms of packing gland is that the tendency of the pressure with in the cylinder 18 to force the packing ringsoutwardly into contact with the rotary valve during the time of explosion and con'ipression, while durin the time of inlet the tendency is to draw these rings away from the rotary valves, thereby relieving the valve of considerable wear and enabling a film of oil to be distributed over that portion of the packing gland that is in contact with the rotary valve.

missible modifications;

-laving thus described my invention what l laixn as new and desire to secure by Letters Patent of the United States is as fob lows. exnress reservation being made of per- 1. A rotary valve explosion engine comprising an engine cylinder having a suitable Water jacket, a rotary sleeve valve surrounding; the engine cylinder outside the water jacket and having ports adapted to register with ports in the engine cylinder, packing rings surrounding thejinlet and e);-

haust'ports of the engine cylinder and bearing upon the lnside of the valve ring, a piston packing ring carried by each of the aforesaid packing rings, and movable at right angles to their lines of movement.

2. A rotary valve gas engine comprising an engine cylinder having inlet and exhaust )orts a rotar sleeve surroundin the engin e cylinder, packing rings surrounding the nlet and exhaust ports of the cylinder and bearing upon the rotary sleeve valve, the engine casing havlng passageways to permit the gas within the cylinder to force the rings into engagement with the valve on the 00mpression and explosion strokes, and rlngs en1- bracing the aforesaid packing rings and movable in the plane of said rings.

3. A rotary valve gas engine comprising an explosion engine cylinder, a rotary sleeve valve surrounding the engine cylinder and having ports adapted to register with inlet and outlet ports of the engine cylinder, a ring'surrormding the inlet and outlet ports of the engine cylinder and bearing upon the inside of the rotary valve,- and piston ring packing carried by the first mentioned ring, and movable in the plane of the first ring, to prevent the escape of gas from the engine cylinder. V

In testimony whereof I have hereunto set my hand this 9th day of March A. D. 19180 JQllll PAGENDARM. 

